The provincial Department of Environment and Climate Change is advising people in the Shubenacadie Grand Lake area to avoid using lake water over the weekend. The department is investigating water quality after a complaint earlier this week about two dogs dying after being in contact with a substance on the lakeshore. Rapid tests done on water samples from the lake on Thursday, June 10, were inconclusive. However, based on visual evidence from the time the complaint about water quality was made, the incident is being treated as a blue-green algae bloom. Additional test results will be available Monday.